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Siemens 5SY6308-7 — 3-Pole MCB (DIN Rail)

Siemens 5SY6308-7 SENTRON MCB, 3P C-Curve, 6kA/15kA

MPN5SY6308-7
Active

Siemens SENTRON 5SY6308-7, 3-pole miniature circuit breaker, C-curve, 6 kA (EN 60898-1) / 15 kA (IEC 60947-2), 400 V AC, 50/60 Hz.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY6308-7 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY6308-7 — Protection
ParameterValue
Tripping characteristic (curve)C
Breaking capacity per EN 608986 kA
Breaking capacity per IEC 60947-215 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Energy limitation class3
Pollution degree3
5SY6308-7 — Electrical
ParameterValue
Rated voltage (AC, multi-phase)440 V
Voltage type (AC/DC)AC
Supply frequency range50/60 Hz
Power loss per pole at rated current (AC, hot)0.9 W
Mechanical service life (operating cycles, typ.)10 000
Neutral conductor switchingNo
Rated voltage (AC, single-phase)440 V
5SY6308-7 — Mechanical
ParameterValue
Modular width units3
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Terminal tightening torque, max.75 °C
Terminal tightening torque, min.-40 °C
Combined terminal, topYes
Combined terminal, bottomYes
Fastening methodQuick assembly system
SealableYes
Accepts supplementary devicesYes
5SY6308-7 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturemax. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
Vibration resistance (IEC 60068-2-6)±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz

Product details

The 6 kA breaking capacity per EN 60898-1 covers most residential and light commercial panelboards; the 15 kA rating per IEC 60947-2 / UL 1077 gives you the headroom for industrial distribution where fault currents run higher. That dual rating is the key spec — if your SCCR study calls for 10 kA at 400 V, the 60947-2 figure clears it; if you're working to a domestic code that only recognizes 60898-1, you still have 6 kA on paper.

Mounting position is unrestricted — vertical, horizontal, or inverted — so it fits tight gland-plate layouts without derating. IP20 with conductors connected; that's the usual panel-interior protection class, not for washdown or outdoor deployment.

The sealable design allows lockout/tagout without an external hasp.

Frequently asked questions

Where can I buy 5SY6308-7 and how is it quoted?

This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time; no stock count or price is published here.

Will 5SY6308-7 drop into a panel specified around 5SY4140-7 without rewiring?

Both are 3-pole SENTRON MCBs on the same DIN-rail footprint with 54 mm width (3 MW). The 5SY6308-7 carries a C-curve and higher breaking capacity (15 kA per IEC 60947-2 vs the 5SY4140-7's lower rating), so it's a functional upgrade for the same physical slot — no rewiring needed, but verify the trip curve matches your load's inrush profile.

What compliance documentation does Siemens provide for 5SY6308-7?

The breaker is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077. Halogen-free and silicon-free construction is documented. Standard RoHS and REACH declarations are available from Siemens on request.

MPN
5SY6308-7